Answer:
c. friction between two charged particles
Explanation:
- If no of carbon atoms be C
- Boiling point of compound be BP
So

- No of carbon atoms is directly proportional to the boiling point of the compound.
- If no of carbon atoms increases in a hydrocarbon the length of carbon chain also increases and all carbons get wrapped around themselves.
- Which causes increase in boiling point of compound.
Look the table below for the boiling points of some alkanes

You tellme i have the same anwser
botch # bit